improve java build process
improve java build process

Change-Id: Ia4c7503ee31fca74fa45da4ff883f3b80b42e85e
Signed-off-by: Klement Sekera <b8003f27414ca85c37624503b7b4e8f8c829bb4d@cisco.com>

FDio/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,milanlenco/vpp,vpp-dev/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,chrisy/vpp,milanlenco/vpp,vpp-dev/vpp,vpp-dev/vpp,GabrielGanne/vpp-flowtable,GabrielGanne/vpp-flowtable,FDio/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,milanlenco/vpp,milanlenco/vpp,vpp-dev/vpp,milanlenco/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp